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SEAGATE TECHNOLOGY, INC.
1-800-SEAGATE
http://www.seagate.com
(C)opyright 1999
ST-38420A (Medalist 8420 Ultra ATA-4)
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º REAR VIEW º
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J2 40 pin I/O Cable Connection
³ pin-20 removed
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Master ON, Slave OFF ÄÄÙ ³ ³ ³
Slave Present (when Master ON) ÄÄÄÄ´ ³ ³
Cable Select (when Slave OFF) ÄÄÄÄÙ ³ ³
Reserved ÄÄÄÄÄÄÙ ³
Limit capacity ÄÄÄÄÄÄÄÄÙ
Limit Capacity jumper sets the default cylinder translation
to 4092 to solve issues with certain BIOS that only auto-detect.
Total available sectors are still at full capacity as reported via
Identify Drive data words 52 - 61. Third party partitioning software
may be needed to achieve full capacity if this option jumper is used.
ST-38420A
Medalist 8420 AT
FORMATTED CAPACITY (MB) __________________8,622
ACTUATOR TYPE ____________________________VOICE COIL
CYLINDERS __PHYSICAL______________________
HEADS ______PHYSICAL______________________4
DISCS (3.5 in) ___________________________2
MEDIA TYPE _______________________________THIN FILM
HEAD TYPE ________________________________MR
RECORDING METHOD _________________________EPRML 16/17 ZBR
INTERNAL TRANSFER RATE (Mbits/sec) _______up to 188
EXTERNAL TRANSFER RATE (Mbytes/sec) ______up to 33.3
PIO/DMA/UDMA MODE (max) __________________4/2/2
DMA SUPPORT ______________________________EISA Type B
SPINDLE SPEED (RPM) ______________________5400
AVERAGE LATENCY (mSEC) ___________________5.6
BUFFER ___________________________________512K
Read/Write Multiple, Read Look-Ahead,
Multi-Segmented
INTERFACE ________________________________Ultra ATA-4
SECTORS PER DRIVE (LBA mode) _____________16,841,664
TPI (TRACKS PER INCH) ____________________13,405
BPI (KBITS PER INCH) _____________________up to 234.0
AVERAGE ACCESS (ms seek/read/write) ______9.0//
SINGLE TRACK SEEK (ms seek/read/write) ___1.5//
MAX FULL SEEK (ms seek/read/write) _______16.5//
MTBF (power-on hours) Office _____________400,000
SHOCK (G's, 11ms/2ms):
operating (Read/Write) __________/63
abnormal ________________________
nonoperating ____________________/300
ACOUSTICS (bels) (typ/max) _______________3.5/4.3
POWER DISSIPATION (watts) ________________
POWER REQUIREMENTS: +12V START-UP (amps) _2.2
POWER MANAGEMENT (Watts):
ACTIVE _______________10.3
IDLE _________________5.5
STANDBY ______________1.1
WRITE PRECOMP (cyl) ______________________N/A
REDUCED WRITE CURRENT (cyl) ______________N/A
LANDING ZONE (cyl) _______________________AUTO
IBM AT DRIVE TYPE ________________________*
Physical:
Height (inches/mm): 1.03/26.1
Width (inches/mm): 4.01/101.85
Depth (inches/mm): 5.78/147.0
Weight (lb/g): 1.2/544
* MAY REQUIRE FORMATTING AND PARTITIONING SOFTWARE. ALSO, CHECK TO
SEE IF YOUR CMOS SETUP HAS A "CUSTOM" OR "USER DEFINABLE" DRIVE TYPE
AVAILABLE. (see below)
Possible translations:
This translation is generally acceptable, as
is, for non-DOS operating systems:
16,383 cyl, 16 heads, 63 sectors = 8,455,200,780
DOS operating systems may require a translation
that uses larger values for the CMOS head
parameter which lowers cylinders below 1024:
1023 cyl, 256 heads, 63 sectors = 8,447,459,328
Other FULL-CAPACITY solutions for DOS operating
systems include third-party drive preparation
software, system BIOS which supports LBA mode
or bios driven host adapters. Otherwise,
capacity may be limited to:
1024 cyl, 16 heads, 63 sectors = 528,482,304
Some systems BIOS have capacity limitations.
Types that have been identified are:
a 2.113GB or 4095 cylinder limitation
a 3.262GB or 6322 cylinder limitation
a 4.22GB or 8192 cylinder limitation
a 8.45GB Standard INT13 limitation (CHS[1024x256x63]x512)
and, if exceeded, may cause the system to hang during boot,
capacity reduction or it can truncate or wrap the cylinders when
auto-detect options set in the CMOS. FAT16 based operating systems
are also limited to 8.4GB. New INT13 Extensions in BIOS and FAT32
based operating systems are both required to acheive full capacity.
DOS 16-bit FAT file system cannot access more than 2.147 Gbytes per
partition. FAT32 file system can create single partitions and
logical drives up to 2TB.
Note: A "custom" or "user-defined" CMOS drivetype may ask for a
numerical value for the Write Precompensation cylinder and for the
Landing Zone cylinder. A basic rule-of-thumb for drive models that do
not require the old Write Precomp technique or a Landing Zone because
they are Auto-Parking is to add 1 to the cylinder value being used. As
an example: If cylinders equaled 820, then both Write Precomp and
Landing Zone would be entered as 821. Some BIOS will convert this to
65535 or -1, which are functionally equivalent to "none (not used)".
Already low-level formatted at the factory.
Since a User-definable or Custom translation geometry may be used, it
is imperative that the values be written down and kept with your
permanent records for retrieval in the event of CMOS battery failure.
Seagate reserves the right to change, without notice, product
offerings or specifications. (03/19/99)
A copy of this specification file may be obtained
by FTP at
ftp://ftp.seagate.com/techsuppt/at/ST38420A.TXT.
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